protosulphideprotosulfiden.

Brit.

/ˌprəʊtə(ʊ)ˈsʌlfʌɪd/, U.S.

/ˌproʊdoʊˈsəlˌfaɪd/

Forms: 1800s– protosulphide, 1900s– protosulfide (U.S.).

Origin: Formed within English, by compounding. Etymons: proto- comb. form, sulphide n.

Etymology: < proto- comb. form + sulphide n. Compare earlier protosulphate n., protosulphuret n.

Chemistry. Now rare.

A sulphide which contains the smallest possible proportion of sulphur in relation to the other element (i.e. one in which the other element occurs in its lowest oxidation state). Cf. proto- comb. form 3a(a), persulphide n.

ΚΠ

1849 D. Campbell Pract. Text-bk. Inorg. Chem. 107 When protosulphide is fused with rather more than its weight of sulphur a liver brown mass is obtained.

c1865 J. Wylde Circle of Sci. I. 376/2 The proto-sulphide is..produced by passing sulphuretted hydrogen through a solution of a copper salt.

1872 Harper's Mag. Dec. 24/2 Black, clinker-like masses—protosulphide of iron, like that used in the laboratory for evolving sulphureted hydrogen.

1915 Jrnl. Industr. & Engin. Chem. 7 353/1 (table) Protosulfide of Copper.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	protosulphide
释义	protosulphideprotosulfiden. Brit. /ˌprəʊtə(ʊ)ˈsʌlfʌɪd/, U.S. /ˌproʊdoʊˈsəlˌfaɪd/ Forms: 1800s– protosulphide, 1900s– protosulfide (U.S.). Origin: Formed within English, by compounding. Etymons: proto- comb. form, sulphide n. Etymology: < proto- comb. form + sulphide n. Compare earlier protosulphate n., protosulphuret n. Chemistry. Now rare. A sulphide which contains the smallest possible proportion of sulphur in relation to the other element (i.e. one in which the other element occurs in its lowest oxidation state). Cf. proto- comb. form 3a(a), persulphide n. ΚΠ 1849 D. Campbell Pract. Text-bk. Inorg. Chem. 107 When protosulphide is fused with rather more than its weight of sulphur a liver brown mass is obtained. c1865 J. Wylde Circle of Sci. I. 376/2 The proto-sulphide is..produced by passing sulphuretted hydrogen through a solution of a copper salt. 1872 Harper's Mag. Dec. 24/2 Black, clinker-like masses—protosulphide of iron, like that used in the laboratory for evolving sulphureted hydrogen. 1915 Jrnl. Industr. & Engin. Chem. 7 353/1 (table) Protosulfide of Copper. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1849
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